Is there a adapter or way to make one of the thunderbolt ports on my macbook pro retina 15 inch a extra USB port?

I am running live sound and mixing using several different interfaces, ins and outs. Is there a way to get another USB port out of one of the thunderbolt ports? All the interfaces I have are USB. I know there are expansion adapters for a USB port I'm just not sure if they would be fast enough to support live sound without some latency issues coming out of 1 USB. It is possible that they would be fine. Just wondering.